Safety tubing-anchor.



D. L. DEISCOLL.

SAFETY TUBING ANCHOR.

APPLICATION FILED PEB.24,1914.

1, 1 18,538, Patented Nov. 24, 1914.

2 BHEETS-BHEET 1.

1N VEN TOR.

fihzul/ adrenal! D. L. DRISGOLL.

SAFETY TUBING ANCHOR.

APPLICATION FILED FEB. 24, 1914.

1 1 1 8, 5 38 Patented Nov. 24, 1914.

2 BHIIETSSHBBT 2.

, 5. r g zz if L Ea J. L l o -24 7 1 4 f INVENTOR 8.6mm MrffiM-z:

r ATTORNEY :onNNIs i2, DnIsoonL, or oov NA, CALIFORNIAL g SAFETYTUBING-ANCHOR.

To klllfwfiomitmay concern.

. Tubing;

wrought iron and steel pipe. '1

Be Ill; known that I, DENNIs L. DRIsooLL, a citizen. of the UnitedStates, residing at Covina, inrthe county of LosgA ngeles and State ofCaliforniafhave invented certain new and useful Improvements in Safetynchors, of which the following is a specification. l i

My invention relatesdto the class of safety; anchors for. Well-tubing,

0 Most Wells, and particularly oil and water Wells, require lining orcaslng to mainta n:

an open hole. 4 Generally oil and wateravells of any consequence aredrilled, and in: such wellspthe diameter is comparatively jsmallThelining, which becomes part of, the well, is usually a metallic tubeof suitablediameter and length, similar to the familiar his is called.easlng, and a long length Qt'casing is called a string; The casing isusually perforated Where it passes throughlthe oil or water-bearingstrata, so the fluid may pen colate into the casing. As ml andwaterbearingstratalare; often very deep, the per} forated portion of thecasing may be as earth.

much'as 4,000fieet below the surface of the It is. the general practice.with wells as above described, to placejwithin thecas ng a metallicconducting pipe, or tube, fouconproper for carry ng, the assembled partsof veying the fluid tothe top ofthe well. This conducting pipe,calledttubingl: oigfstring of tubing, 18 slmilar to'lthe casing,but,;-oi:

course, is smaller so that it anay -be placed within 1t.2 wheneveriitlsnecessary to pump the'fluid, from the Well, as is generally the case; apump. of the plunger type is fitted to a the lower end of the tubingiandoperated from the topbymeansioit astring of sucker rods'. Frequently,for various reasons,- it is necessary to remove the string of tubingfrom the Well.. This is accomplished'bylii't ing the string throughmeans of ,suitable tackle and devices attached :to the itop lof thestring. As the strings of tubing are very long, suitable lengthsarezunscrewed as the tubing is lifted abovefithe top of the well. lVhilea section is being unscrewed, there'- maining portion of thepstring issuspended by suitable device attachodto thetubingpat the top. It will beseemfromtthe above that when the tubing is beingw'removed i'rom1a well,the string is suspended from the top and the lower end maybe quite adistance from the bottom of the well. ThlS illSO. .11s

Speeiflcatioii of Letters Patent. P t t Application ma liebruary 24,1914.

Serial No. 820,485.]

ed N 0v. 24,191441 truenvhenthe tubing s raised to bring the pump abovethe bottom of the Well, as nay often be the case; N ow should any laccident occur to the various devlcesused, to suspend, or raise the tubng, or,,as frequently happens, should the string of tubinglpart v,

at some joint below thetop oftheHvell, the

unsupported pdrtiomofthe tubing'will drop to the bottom of the well withresults.

My inventit disastrous 1, is des gned partlcularly to overcome,thehdanger of: dropping tubing,

but the" principlesare also applicablehlto other hwtillj tools ordevice's. H 1

My invention consists mjthe IIQVGI v safety:-

anchor, which Ishall now fully describeby relference to, theaccompanying drawings in wuchl we. o ill/Vi I igurel s a vertical secton of my anchor showmgit m set poslt on forpassmg down;

through thevcasing, to the point ,whichlit is to be tripped. Fig. QlSlan elevation of the anchor showing it tripped. Rig. ]3 islafl seetion online of, Fig. 2. Figs is;a seetionlon line .y -Ig "Of FigHQQV a 1 is theivelL-casing, If a i I 2 is a section of tubing which in the purview ofmy invention forms, not only, part:

of the tubing-string,infto which it is let by suitablecouplingslatteachaend, such as are.

indicatedat 2f,l,but also forlnsthe stock 1 my safety anchor.

3 is the body iforthe, slip-jaws :4. These aws, which in this art, arecommonly termed $slips are, ingeneral, of the usual character, belngysldably :fitted to upwardlydivergenttapered seats on the bodyf3 byineanseof suitable connections, as, for example, by tongues on the backOfQth e sliPs and grooves (3 in the taper faces or seats ot the body.llhe outerfaces of, the slips are the casing, and as they move up,saidfaces contact with and are ready to grip the casmg. The bodyw3 is,insuitablemanner,

made fastand rigid on the tube section 2. The base, of each slip 4tis,formed. with an extension op cal- 8, which isprovided on its innerfacewwith a groove 9, to receive a flange; 10, on the head of a sleeve11, which is freoly mounted and adapted to ,turnupon.

thetube section 2. The flange 1O ofthe s'leevelhas.openingsl2 to enableit and the 1 grooved ears 8 of the slips to interengage and to disengageas the case may be. 1n the base of the slip-body 3 is mounted slidably alocking-pin 13, which is projected downwardly by a spring 14, and in thefiangelO of the sleeve ll'is made a hole 13 to receive said locking pin.The sleeve 11 may be a single continuous one, but for constructivereasons it is here shown as in two parts, united by a collar 15, theupper side of which forms a supporting shoulder for the lower end of aspring 16, the upper end of the spring carrying a freely slidable ring 17 embracing the sleeve. This ring co'acts with the'slips, eitherdirectly or, as here shown, through the intervention of pins or studs 18depending from the ears of the slips and contacting with the ring. 1

19 are friction-members in the form of springs Which from their mountingmay be termed floating in that their upper ends are secured to aheadring 20 freely mounted on the sleeve 11, and their lower ends aresecured to a foot clutch-member 21 also freely mounted on the sleeve:There may be any number of these springs and they may be composed of oneor more leaves.

- They-'frictionally engage the casing 1, as

shownin Fig. 1. Between the bottom of the sleeve collar 15 and the topof the headring 20-is an anti-friction bearing 22 shown as of theball-bearing type. The

- clutch member 21 .has'tongues 23which are adapted to engage grooves 21in the upper face of a clutch collar 25 on the lower end of the sleeve11. 1

The operation is as follows -The device is set, before it is placed inthe well, by compressing the spring 16, pulling down the slips 1 androtatingthe sleeve 11, so that its openings 12 are outof line with the.

ears 8 of the slips, thereby locking said slips in the position shown inFig. 1. The device being new connectedwith the tubing by the couplings2, is then lowered on the tubing into the well and the friction springs19 press against the walls of the-casing 1 and prevent the foot ringclutch member 21 from turning. The rest of'the device, with the stringof tubing, may however rotate freely in either direction, without dangerof tripping the mechanism, and the whole may be lowered in the casing toany desired point. It will be seen by Fig. 1 that when the slips 1 arein the set position ready for tripping, they do not engage the walls ofthe casing because they are pulled down on their taper seats. It shouldalso be noted that when the device is being lowered in the casing, thatthe friction springs 19 with attached rings 20 and 21 are forced or tendto be forced upward, due to the friction of the springs with the wallsof the casing. Therefore, the clutch member 21 is held away from theclutch member 25 and there here is no engagement between the sleeve 11and the springs 19.

WVhen the tubing has been lowered to the desired depth in the, well, thesafety anchor is made ready for tripping as follows The tubing is raiseda few'inches, or enough to bring the clutch member 25 up into contactwith the clutch member 21, which is held in position by the frictionspring 19 engaging the walls of the. casing, At the same time, thetubing is rotated slightly so as to engage the two clutch members bytheir tongues 23 and grooves 24, as shown in Fig. 2. 1n this positionthe anchor is ready to be tripped.

It will be seen that through the :clutch 21-25 and the contact of thefriction springs 19 with the walls of the casing, the

sleeve 11 is now held from turning, and that a further rotation ofthetubing will turn only the body -3 with its slips Ase as to bring theears 8 of the slips in line with the openings 12 in the flange 10 ofsaid sleeve 11. At this position the slips are released and areforcedupward by the expansion of the coil spring 16. A slightly further r0-tation of the tubing brings the hole-13 in the flange 10 of sleeve 11 inline with lock pin 13, and said pin is forced into the hole by itsspring 14 and lockssleeve 11. In this position the anchor is fully setfor use and the coil spring 16 forces the slips 4: up-' ward on theirtaper seats in the body 3 until the teeth of the slips engage the wallsI of the casing. The farther the slips move upward the more they areforced outward into engagement with the casing. Also, as the teeth 7 ofthe slips engage the walls of the casing, it will be seen that anydownward movement ofthe tubing is prevented, as it tends to expand ormove the slips'outward and make them grip the casing more firmly.Thetubing, however, may-be raised or even removed from the well, .as theupward motion releases the grip on the casing.

From the foregoing description, it will be seen that my safety anchormay be positively set before it is lowered into the well;

that it may be lifted in the casing without any danger of droppingthrough accident; that it may, whenever desired, be-positivelytripped;-th:1t once it is tripped it islocked, so the tripping mechanismcannot interfere with the gripping action; that the tubing,

1,118,638 i a 3 a are external to the central tubing on which they areassembled, andthat it may be located above the lower end of the tubingstring above the pump, soasto be above the perforated portion of thecasing, obviating danger from causing sand to bridge between the tubing.Uld the casing.

I claim i 1 1.;A safety tubing anchor comprising a tubular stoclcwithmeansfor securingit in the tubing-string; a taper-seatjslip-body fast onthe stock; slips fitted to and slidable upon the taper-seats of a thebody "a sleeve in which the stock is rotatably fitted belowtheslip-body; a spring and means operatedlby its expansion to force theslips upward; and

inter-engaging .instrumentalities betweenithe lower iends of therslipsand the head olilthe sleeve, operated by the relative axial movement of,the stock a nd sleeve to hold the slips down and to trip them. a l 1- 2.A safety tubingpanchor comprisinga tubular stock withxmeans forse ouring it in i the tubing-string; ataper-s'eat slip-bodyfast on thestock;slips fitted to and sl-idable upon the taperseatsof the body; asleevein which the stock is rotatably fitted below the slip are tripped?body; a spring land means bperated by its expansion to force the slipsupward; interengaging instrumentalities betweenthe lower ends of theslipsand the head ofthesleeve, operated bythe relative axiatmovement ofthe stock and sleeveto hold the slips down andtotrip them, and a springbolt in the base of the' slip-body adapted to engage a socket "in-thehead of the sleeve to lock the parts against relative motion after theslips -30A safety tubing anchor comprisingfia tubular stock with meansfor securing it in the tubing-string; a taper-seatslip-body faston-thestoclr; slips fitted to and slidable upon, the taper-seatsofthebody; asleevein which W2 the stock is rotatably fittedbelow theslipbody; a springand means operated by its expansion to force the slipsupward; and interengaging instrumentalitics between the lower-endsofthegslips and the head of the sleeve, operated byth'e relative axialmovement ofthe stock and sleeve to hold the slips down and to triputhem, consisting of ears,

extending from the slips and having grooves 1n their innerfaees, andafflange on the head of the sleeve adapted toseat in thegroo-ves thepassage of said ears.

offthe ears, andprovided with openings for 4:, safety tubinganchorcomprising a tubular stock wlth means for securing it in thetubingstring; a taper-seat slipbody fast on the stock; slips fittedjtoand 'slidable upon the taper-seats (if-the body; a sleeve in which 4 thestock is rotatably fitted below the slipbody; a spring andmeansoperatedby; its

expansion to force the slips upwardriiiter engaging instrumentahtlesbetween the lower 1 ends of the slips and the head of the sleeve,

operated by the relative axial movement of tie stock and sleeve to holdthe slips down and to trip them, consisting of ears extend- :ing fromthe slipsand having grooves in their inner faees and gawflange on thehead of the sleeve adapted t o seat in the grooves gage a socketrin the;lheadof the sleeve to lock the parts againstzi relative motionafter theslips are tripped. 1 I

5. A safety tubing fanehor} comprising a tubular stock withmeansforseem'ingit in the tubing stringratapeu-seat slip-body fast onthe stock; slips fitted to and slidable upon the taper-seats of thebody; a sleeve in which the stoclciis rotatably fitted below theslipbody a spring and ,means operated by its expansion to force theslips upwardyinterengaging instrnmentali ties between the lower ends ofthe slips and thehead of the sleeve, operated by the relative axial"movement of the stock and sleeve to hold theslips down and to tripthem, and meansfor holding the sleeve against rotation while the stockis turning on its axis to trip the slips.

(3. A safety tubing anchor COII'IPIlSlJIg a tubular-stock with means forsecuring-i6 in the tubing-string a taper-seat slip'body fast on thestock; slips fitted to andslidable upon the taper-seats of the body; asleeve in which the steckflis rotatably fitted belowthe slip-bodyg aspring and means operated by 0 itsexpansion to force the slips upwardinter-engaging, instrumentalities between the lower endsyof the slipsand the head of the sleeve, operated by the relative axial move ment ofthe stock and sleeve to l lQld the slips downand totripthem, and meansrotund ing the sleeve against rotation while the stock is turning on itsaxis to trip the slips, consisting of spring members carried by thesleeve and frictionallyengaging the walls of the well casings a A:safety tubing anchor eon'iprising a operated by the relative axialmovement of the stock and sleeve to hold the slips down, and totrip-them, and means for hol'dingthe sleeve against rotationwhilethestock turning on'its axis totrip the slips, consisting of spring memberscarried by the sleeve and frictionally engagiiig the walls ofthe welleasing, said members being mounted rotatably upon the sleeve, and aclutch between 13o &

the spring members and the sleeve operated by turning the stock andsleeve on their axes. I v

8. A safety tubing anchor comprising a tubular stock with means forsecuring it to the tubing-string; a taper-seat slip-body fast on thestock; slips fitted to and slidable upon the taper-seats of the body;a'sleeve in which the stock is rotatably fitted below the slip body; acollar on said sleeve; a spring seated at its lower end on the collar,and having its upper end arranged to force the slips upward;interengaging instrumentalities between1the lower ends of the slips andthe head of the sleeve, operated by the relative axial. movement of thestock and sleeve, to hold the slips down and to trip them;spring-members adapted for frictional contact with the well-casing, saidsprings being carriedybya head ring and a foot ring bothrotatably fittedon the sleeve, and the foot ring forming one ;member of a clutch; aclutch member on the foot of the sleeve coacting with the clutch memberof the foot ring of the spring members; and an antifrictionbearingbetween the sleeve collar and the head ring of said springs.

9. A safety tubing anchor comprising a tubular stock with means forsecuring it to the tubing-string; a taper-seat slip-body fastonthe-stock; slips fitted to and slidable upon the --taper-seats of thebody; a sleeve in which the stock is rotatably fitted below the slipbody;a collar {on said sleeve; a spring seated at its lower end on thecollar, and having its upper end arranged to force the slips upward;interengaging instrumentalities between the lower'endsof the slips-andthe head of the sleeve, operated by the relative axial movement of thestock and sleeve, to hold the slips down and to trip them; springmembersadapted for frictional contact with the well-casing, said springsbeingcarried by a head ring and a foot ringboth rotatably fitted on thesleeve, and the foot ring forming one member of a clutch; a clutchmember on the foot of the sleeve coacting with the clutch member of thefoot ring of the spring members; an antifriction bearing between thesleeve collar and the head ring of said springs, and a spring bolt inthe base of the slip-body adapted to engage the head of the sleeve tolock the parts together when the slips are tripped.

10. A safety tubing anchor comprising a tubular stock with meansfor'securing it to the tubing-string; a taper-seat slip-body fast on thestock; slips fittedto and slidable upon the taper-seats of the body; asleeve in which the stock is rotatably fitted below the slipbody; acollar on said sleeve; a spring seated Copies of this patent may beobtained for at its lower end on the collar, and having its upper endarranged to force the slips upward; interengaging instrumentalities be'tween the lower ends of the slips and the head of the sleeve, operatedby the relative axial movement of the stock and sleeve to hold the slipsdown and to trip them, consisting of ears extending from the slips andhaving grooves in their inner faces, and a flange on the head of thesleeve adapted to seat in the grooves of the ears, and provided withopenings for the passage of said ears; spring-members adapted forfrictional contact with the well-casing, said springs being carried by ahead ring and a foot ring both i rotatablyfitted on the sleeve, and thefoot ring forming. one member of a clutch; a

clutch member on the foot of thevsleeve coacting with the clutchineinber of the foot ring of the. spring members; and an antifrictionbearing between. the sleeve collar and the head ring of said springs. v

11. A safety tubing anchor comprising a tubular stock with means forsecuring it to the tubing-string; a taper-seat slip-body fast on thestock; slips fittedxto and slidable upon the taper seats of the body; asleeve inwhich the stock is rotatably fitted below the slipbody; acollar on. said sleeve;fa spring seated at its lower end on thecollar,'and having its upper end arranged toforce the slips upward;interengaging'v instruinentalities be tween the lower ends of the slipsand the head of the sleeve, operatedby the relative axial movement ofthe stock and sleeve,'t0 hold the slips down and to trip them,consisting of ears extending from the slips and having grooves in theirinner faces, and a flange on the head of the sleeve adapted to seat inthe grooves of the ears, and provided with openingsfor the passage ofsaid ears; spring-members adapted for frictional contact with thewell-casing, said springsbeing carried by a head ring and a foot ringboth rotatably fitted on the sleeve, and the foot ring forming onemember of a clutch; a clutch member on the foot of the sleeve coa'ctingwith the clutch member ofthe foot ring of the springmembers; anantifriction bearing between the sleeve collar and five cents each. byaddressing the Commissioner ofvPatent s Washington, 12. .0.

